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This research introduces a dynamic data mining process (DDMP) system based on service-oriented architecture (SOA). Each activity in data mining process is viewed as a Web service operated on Internet. The Web services provide functions of data preprocessing, data mining algorithms, and visualization analysis. Depending on user's requirement, the Web services are dynamically linked using Business Process Execution Language for Web service (BPEL4WS) to construct a desired data mining process. Finally, the result model described by Predictive Model Markup Language (PMML) is returned for further analysis. A practical credit card data set provided by a commercial bank is implemented using the proposed system. It is found that the DDMP system can provide dynamical and satisfied analysis result to the enterprise.